Struct MultiObserver 

pub struct MultiObserver { /* private fields */ }

Observer that forwards events to multiple child observers.

Useful for composing multiple observers, such as logging to both a progress bar and a log file.

Implementations

impl MultiObserver

pub fn new(observers: Vec<Arc<dyn VoidObserver>>) -> Self

Create a new multi-observer from a list of child observers.

Arguments

• observers - List of observers to forward events to.

pub fn add(&mut self, observer: Arc<dyn VoidObserver>)

Add an observer to the list.

Arguments

• observer - Observer to add.

pub fn len(&self) -> usize

Returns the number of child observers.

pub fn is_empty(&self) -> bool

Returns true if there are no child observers.

Trait Implementations

impl Debug for MultiObserver

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl VoidObserver for MultiObserver

fn on_event(&self, event: &VoidEvent)

Called when an event occurs.